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[S390] cio: Trigger verification on device/path not operational. 

Currently, we don't do much on no path or no device situations during
normal user I/O, since we rely on reports regarding those events by
the machine. If we trigger a path verification to bring our device
state up-to-date, we (a) may recover from path failures earlier and
(b) better handle situations where the hardware/hypervisor doesn't
give us enough notifications.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
This commit is contained in:
Cornelia Huck 2008-04-17 07:46:00 +02:00 committed by Heiko Carstens
parent 22806dc1a8
commit fe6173d9b3
2 changed files with 13 additions and 2 deletions
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9
drivers/s390/cio/device_ops.c
View File

@ -193,8 +193,15 @@ int ccw_device_start_key(struct ccw_device *cdev, struct ccw1 *cpa,
return -EACCES;
}
ret = cio_start_key (sch, cpa, lpm, key);
if (ret == 0)
switch (ret) {
case 0:
cdev->private->intparm = intparm;
break;
case -EACCES:
case -ENODEV:
dev_fsm_event(cdev, DEV_EVENT_VERIFY);
break;
}
return ret;
}

6
drivers/s390/cio/device_status.c
View File

@ -312,6 +312,7 @@ ccw_device_do_sense(struct ccw_device *cdev, struct irb *irb)
{
struct subchannel *sch;
struct ccw1 *sense_ccw;
int rc;
sch = to_subchannel(cdev->dev.parent);
@ -337,7 +338,10 @@ ccw_device_do_sense(struct ccw_device *cdev, struct irb *irb)
/* Reset internal retry indication. */
cdev->private->flags.intretry = 0;
return cio_start(sch, sense_ccw, 0xff);
rc = cio_start(sch, sense_ccw, 0xff);
if (rc == -ENODEV || rc == -EACCES)
dev_fsm_event(cdev, DEV_EVENT_VERIFY);
return rc;
}
/*